*Disclaimer: I do not own Fairy Tail or High School DXD.*

A/N: This chapter is a little late but oh well, hope you don't mind it as much. And as I've said before, there will always be some info about stuff in the A/N at the end so watch out for it.


The Unknown Demon

Chapter 4

The sky above Kuoh Academy had turned red. Looking around, one could see the excitement on the students and guests face alike as they participated in the school festival. Yet none of them moved. Their faces, bodies and even the drink that had fallen out of a student's hand, were all still as if frozen in time. If one had not been frozen in time, they would notice that the temperature in the area had also changed to dangerously low levels.

Amongst all that, a flash of pink could be seen running around. He jumped around from the different buildings of the school as ice spears were shot at him from behind. All the ice spears were dodged at the last minute as some of them had ripped Natsu's clothes while he dodged.

Chasing somewhat at a distance was the silver haired queen of Lucifer, Grayfia. Her expression was somewhat stoic but if one observed closely enough, anger could be seen.

Now, how had this situation come to be? Let's go back in time to find out.

Thirty Minutes Ago

'That was close… Almost ran into the Satan.' Rose thought as she was pacing away from the place where Natsu and Sirzechs met. She had seen him approaching from the corner of her eyes as she stood near the stall parallel to where Natsu was eating takoyaki. It would've been troublesome if she had run into anyone who was higher up in the Devil's society.

"Maybe I shouldn't have come here." She muttered with a sigh as she thought who else could be here if one of the Four Satan's were here.

She walked around the festival as she completely erased her presence. Her power might not reach any of the ultimate class devils but she was sure her ability to hide her presence was better than anyone else in the Underworld. After all, she had hid herself for so long without anyone noticing.

"I wonder if Natsu was found out. He's pretty cunning when he wants to be so I guess he'll be fine." Rose worried about Natsu for a second but dismissed the thought when an image of Natsu with an evil grin came into her mind. No way would he be outdone by anyone.

But it wasn't the time for Rose to be worried about someone else. She suddenly felt a chilling gaze at her face from the left. She tried to ignore it and tried to walk away but the person suddenly called out with a commanding tone.

"Excuse me, but would you mind if I got a better look at your face?"

'Shit!' Rose's thoughts ran wild as she got a look at the person who had called out to her. The Ice Queen, Grayfia Lucifuge.

Rose tried to run away but if she made any sudden or out of place movement in a place filled with so many humans, she would draw unwanted attention so she started to walk away from the place.

"Wait." A cold hand suddenly grabbed her arm and prevented her escape from the situation.

"You look very similar to someone I knew. Her name was Elena Orobas. What is your relationship with her? The Orobas Family?" Grayfia asked the question with an unnatural intensity usually not seen in her stoic attitude. But this fact was not known to Rose as she had never met the person before.

"I don't know what you're talking about." Rose's reply was quick as if she already knew what to say before she was even asked.

"No need to worry, I can sense that you are a devil. I have to commend you for almost going unnoticed by me." Grayfia stated while looking Rose in the eye. She knew that Rose had slightly panicked when she first saw Grayfia and let some of her presence out before reeling it back in. "I mean you n-" Grayfia suddenly cut herself off as she suddenly felt someone's hand on her shoulder.

"Could you not bully her? She likes to act tough but panics really quickly." Grayfia looked back with a swift movement while letting go of Rose's arm. Natsu, who had put his hand on Grayfia's shoulder let go as if allowing the silver haired devil to turn around properly.

"Don't worry, I was just returning the favor." Natsu replied before Grayfia even asked him anything. But his answer left her even more confused. This was Natsu's payback for Sirzechs sneaking up on him earlier. But it was forever left unknown to Grayfia.

"Who are you?" Grayfia asked in a calm tone unlike her tone when she was talking to Rose.

"I'm Natsu, and over there is my friend Rosia Asai, call her Rose." Natsu introduced himself and Rose while trying to avoid a conversation between the two women here. He had no idea what it was all about but he knew Rose had something she had not told him.

"I see. Now, if you wouldn't mind answering my question from before Rose-san." Grayfia turned her attention back to Rose.

"It doesn't look like she knows what you're talking about, old lady." Natsu again intervened while pressing on Grayfia's nerves. Pissing women off was so easy.

"…Old women?" A dark aura started to form around Grayfia as she started to let out some of her magic power.

"Well, you're couple centuries old right? So you're basically a grandma." Natsu applied more salt to the wound with an innocent face.

"Natsu…" Rose said while several beads of sweat ran down her face. Did he really just say that to one of the strongest women in the Underworld?

"It seems you're lacking in manners. Allow me to correct that." Her somewhat stoic face had several tick marks with a dark glint in her eyes. She formed a barrier around the school in order to prevent any damage.

Before Grayfia started moving, Natsu suddenly brought his mouth close to Rose's ear and whispered his words of wisdom.

"Run."

And that is the reason why Rose is hiding behind the school building and why Natsu is being chased by an angry maid. The Ice Queen had completely forgotten about Rose while she tried to pierce Natsu with her ice spears as he jumped around laughing heartily.

"You sure know how to jump around like a monkey." An insulting remark came from Grayfia.

"You'll make me fall for you if you chase me around with that kind of intensity in your eyes." Natsu laughed again as he turned his whole situation into a joke.

"How about this then?" Grayfia stopped and kicked the ground lightly as all surfaces in their vicinity suddenly turned into ice. Of course, this was nowhere near the extent of what the strongest queen could do. But she did not plan to go all out for a stupid reason like this.

"Hah! Like this'll work. I've fought ice pricks like you before!" Natsu said with childish excitement as he light his feet on fire before he landed on the ground from his jump. The ice and ground alike were crushed underneath his feet.

"A fire user huh? No matter, I also have experience in fighting against fire." Grayfia gracefully landed in front of Natsu as they stared off against each other.

Both of them had brought their little game from the school building into the school's wide soccer field.

"You're pretty good at dodging. But is that all you can do?" It seemed that Grayfia had even forgotten about her initial reason for chasing Natsu as she had become somewhat absorbed in their match.

"Far from it! I got loads where that came from!" Natsu suddenly formed a gigantic fireball in the sky. It took Grayfia by surprise as she saw the giant fireball form under half a second before it was directly in front of her face. But her surprise was gone as fast as it came. She brought her right hand forward and put a minuscule amount of magic power into it in order to disperse the fireball.

But the moment her hand came in contact with the fireball, it exploded. The explosion covered the entirety of the soccer field as the flash could be seen by all who were rushing over to the soccer field to see what was happening.

While the dust from the explosion was subsiding, the figures of Sirzechs, Rias and her peerage, Lady Gremory and Lord Gremory could be seen approaching the field. Koneko and Kiba covered their faces with their arms as the dust and the heat from the explosion was flowing towards them in waves. The rest seemed to have formed small barrier to shield themselves.

All of a sudden, the little dust that was left was suddenly blown away by a magical force as the field cleared up to show a gigantic crater encompassing the entire field.

In the middle of the crater, an odd platform was raised seeming to be the only part of the ground that had not been destroyed in the explosion. On top of the platform stood Grayfia who was completely unscathed with a few burn marks on her dress. But Natsu could not be seen anywhere.

"Grayfia-chan, what happened?" The one who spoke first was Lady Gremory who had a hint of worry in her voice.

Grayfia looked around and saw that all who were presence were in a similar situation to Lady Gramory with worry and confusion evident on their faces. Only Sirzechs did not show any confusion, rather he was ready to hear what had happened.

Grayfia looked around for any signs of her opponent before she looked towards the group and answered.

"My apologies if my actions caused you worry. Let's go to an appropriate place and I'll explain what happened."

With that, everyone started to move towards the Occult Research Club while Grayfia undid the barrier which unfroze the time and completely repaired all the damage that had been done.


"That was so close!" Natsu said with a chuckle as he appeared right next Rose as she had been pacing back and forth behind the school building.

"Natsu!?" Rose suddenly cried out in surprise as she fell down on her butt.

"Yo! Having fun?" Natsu said with a cheeky voice as he offered her his hand.

"Do you know how worried I was?! You didn't have to take her on for a fight you know!" Rose retorted back as she lifted herself up with Natsu's hand. She knew that Natsu could've escaped any time he wanted but stuck around to have fun.

"Oi oi, you can't go and give me that attitude. I saved you ya know?" Rose stared at Natsu as he said his words of triumphant. Since Natsu was taller than her, it looked as if he was looking down on her with his head held up high.

"And you got some explaining to do. What did she mean when she said you looked like someone else?" Natsu suddenly brought out the topic that Rose had hoped he wouldn't.

"…do I have to?" Rose gave up trying to deny it before she even tried. She knew that there was no way to hide something from him.

"Yup, you have to. But let's go back before that. I went over to Hiro's stall earlier so we're good to go."

After Natsu's declaration, Rose walked up to him and linked her arms. Usually she would put on a naughty face while doing something like this but right now was not the time for that. She simply held on to him so he could teleport them back home.

While Natsu and Rose teleported back to their house, Hiro was standing in front of Natsu's car which had been crushed by a huge block of ice.


The school festival had started to die down as the evening was approaching. There were many students who were rushing around while taking off posters and dismantling their stalls and such. But no one noticed that the Occult Research Club's little tent had completely disappeared.

The tent was placed in one of the empty rooms in the old school building as Akeno had used magic to teleport the whole thing here to save time.

Several figures had gathered in the elegant room which was the Occult Research Club Room. Rias, Akeno, Koneko and Yuuto had all changed their clothes into their usual school uniforms. Rias was sitting on the chair behind her desk while Akeno took a seat on one of the sofas with Yuuto and Koneko. Sirzechs, Lord Gremory and Lady Gremory sat at the opposite end of where Akeno and co. where sitting. The main actor of this stage, Grayfia, was standing courteously next to the couch waiting for the conversation to start up.

"Alright Grayfia-chan, we're all ready. Tell us what happened." Lord Gremory brought up the topic of their gathering. All eyes turned towards the silver haired devil as she moved her lips to talk.

"Yes, I apologize again for the trouble." Grayfia slightly bowed with her apology before she continued on. "I was walking around and observing the school festival when I came across someone that looked very familiar to me."

"Familiar to you?" Sirzechs questioned Grayfia's statement.

"Yes, she looked very similar to Elena Orobas."

"Elena!?" The surprise on Lady Gremory's face was obvious as she repeated the name.

"Do you know that person mother?" Rias asked her question with confusion in her voice. She was unable to follow the conversation as she did not know who this person was.

"Yes, Elena Orobas was the head of the Orobas Clan which was one of the 72 pillars. But their family was destroyed during the war so she shouldn't be alive…" Lady Gremory trailed off in her explanation.

"One of the 72 pillars huh…" Yuuto's surprise was obvious as was everyone else's.

"Are you sure it was her?" Sirzechs asked for confirmation from his Queen.

"She looked almost like a copy of Elena Orobas but she was not her" This time, Grayfia responded with confidence in her voice. She knew that it was not possible for Elena to still be alive and Rose's presence seemed very small compared to Elena's.

"Are you saying it was her child? But that's impossible. They definitely died during the war. But if someone from that clan is alive then…" Lord Gremory had a grim expression on his face as he looked deep in thought.

Akeno looked towards Rais as she did not understand the situation only to find her King in the same situation. Koneko and Yuuto looked lost too.

Seeing that her father was busy in his own thoughts, Rias looked towards her brother.

"Onii-chan, is this Orobas Clan really dangerous?"

"Rias-chan, it's a little more complicated than just being dangerous. The Orobas Clan was a very big war potential on our side during the war. The Orobas Clan held the power to control the fire from Hell's Furnace, Hellfire. Hellfire is capable of burning almost anything. But the members of the Orobas Clan were very few so they did not dominate the war like they had wanted to. In order to gain more power, the members of the Orobas Clan tried to gain absolute control over the Hell's Furnace and got consumed by it. They went mad with power and were put down by the other clans. If I'm correct, Grayfia, who fought for the other side, had numerous battles with Elena Orobas." Sirzechs conluded his explanation and looked towards Grayfia.

"Our powers were opposite of each other so we met in combat numerous times." Grayfia added to Sirzech's words.

Rias and her peerage seemed to have a better understanding of the situation now.

"So, if it really was someone from the Orobas Clan, then they would want revenge against us for destroying their clan?" Rias tried to see if her reasoning was correct.

"I would doubt that. The person I met, Rosia, did not seem to harbor any malice towards me even after she realized who I was."

"Then how did that escalate into a battle?" Lady Gremory chimed in as she got the conversation back on track.

A nerve suddenly appeared on Grayfia's forehead as she remembered the reason. The image of a grinning Natsu flashed into her mind along with the word 'Old Lady.'

Everyone noticed the tick marks and slightly winced at the dark aura Grayfia was emitting.

"That… was someone else's fault." Grayfia stopped her gritting teeth which she didn't realizes she had been doing and answered Lady Gremory's question.

"S-someone else's?" Sirzechs stuttered a little as he looked at his Queen. It was not often that she lost her cool so quickly.

"During our conversation, someone interfered and insulted me. I lost my composure and attack that person. Though it seemed that he managed to get away after the explosion he caused."

Everyone was staring at Grayfia with a surprised expression. The reason for their surprise was not because someone insulted her. Rather it was because someone managed to get away from her after incurring her wrath.

"Who was this person? I don't sense someone capable of escaping from Grayfia-san anywhere in the school." Rias asked as she tried to calm herself down. It would be a very big mistake on her part if she failed to notice someone this strong in her territory. The others also had an interested look on their faces as they waited for her to answer. The one who seemed the most interested was The Crimson Maou as his face was filled with delight when he thought about some easily messing around with Grayfia.

"He had pink hair and introduced himself as Natsu."


At the same time Grayfia was doing her explaining, Natsu and Rose were sitting in the living room of their house. The living had a big couch in front of a big flat screen television. The surroundings were heavily furnished with various things.

On the couch, Natsu and Rose could be seen sitting fairly close to each other despite there being a lot of free space on the couch. Rose had switched to her pajamas while Natsu simply wore shorts with a loose tank top.

"So, start talking." Natsu got straight to the point with a smile on his face.

"No side talk eh? Oh well." Rose seemed to have wanted to avoid the topic right off the bat but it didn't seem like it would work out.

"I told you my name is Rosia Asai right?" Rose started out with a question which earned a nod from Natsu.

"But technically, my name should be Rosia Orobas."

"Hm." Natsu made a small noise as his acknowledgement.

"The Orobas Clan was a very powerful clan in the Underworld and was one of the 72 Pillars. But their numbers were very few even compared to other clans. Due to that, the heir to the clan at the time, Elena Orobas, had her marriage arranged beforehand with another powerful clan. But she did not accept and decided to elope with another demon from a less powerful clan. She had two children with that demon before her lover was killed and she was forcefully brought back."

Rose stopped to look at Natsu's expression but it was somewhat hard to read. Rose knew that Natsu was serious since that was the only time he would have this expressionless face.

"And after that, she was wed to her previous fiancé and became the head of the clan. Soon after her succession, the war started and the Orobas Clan became a part of it. At the time of the war, she had had three other children who were also very powerful. During the war, her children wished for more power and decided to take control over the Hell's Furnace and went berserk."

"And I'm guessing that silver haired demon was one of the people who killed them?" Nastu asked if his conjecture was correct.

"Yes. Along with some of the clans on the New Hell's side. Currently that silver haired devil is, The Crimson Maou, Sirzechs Lucifer's Queen. But at time of the war, she fought for the Old Hell and fought Elena Orobas several times."

"Hou, so she was a Queen?"

"Yup, and the strongest one at that."

Natsu held a slight interest in Grayfia before he went back to Rose's story.

"So I'm also guessing that your father is one of the kids Elena had with her lover?" Natsu asked Rose but he already knew the answer.

"Yes."

"What happened to your father? What about the other kid she had?"

"My father passed away along with his sister, my Aunt, after he tried to stop her from losing control when she tried to take control of the Hell's Furnace." Rose said with slight sadness in her voice.

Natsu patted her head as he looked at her with a gentle smile. He knew very well what it was like to lose people close to him.

"So, do you hate the devils then?" Natsu asked as he kept patting her head.

"No, I just didn't want to have any relation to them as they might find out I'm from the Orobas Clan and try to kill me."

"Well, the ice maid didn't look like she wanted to hurt you though. But don't worry. Even if they do try something, I'll kick their butts for you!" Natsu exclaimed as he raised his other hand in the air. Rose gave into his pat and leaned in closer to him.

After a few minutes' passes in silence and Natsu became very excited at a sudden thought he had.

"Hey Rose, can you also use Hellfire? I know you know normal fire magic but since you're part of the Orobas Clan, you should be able to use Hellfire too right?"

A small melancholic smile appeared on her face. "No, it seems I can't use it since I'm not pure-blooded."

"Ah, too bad. But you're still hotter than hell ya know." Natsu slipped in a compliment to improve her mood and it seems to have worked.

"You sure know what to say." The smile on Rose's face turned bright as she looked at Natsu.

"Alright, let's start preparing for tonight!" Natsu got up and ushered Rose to get up as well.

"Did we have any plans tonig- Kyaa!?" Rose asked Natsu but was interrupted by Natsu.

"Yup! We're having guests over for dinner and a few drinks. We'll use the second floor so set it up." Natsu said with a cheerful smile while he picked up Rose bridal style and walked out towards the stairs to the second floor.

'Hehehehe, this is gonna be fun.' Natsu thought sneakily as he thought about who he had invited over for dinner tonight.


Bio

Name: Etherious Natsu Dragneel

Other Names: END, Natsu Dragneel

Age: 800+

Eye Color: Black

Hair Color: Salmon

Height: 6'3" ft.

Affiliations: Dragon Alliance (Former Member), Tartarus (Former Master), Fairy Tail (Former Member)

Magic: Fire Dragon Slayer Magic, Re-equip, Fire Magic, Various Others

Curses: Fire Curses, Phantom Curse, Various Others

Abilities: Master hand to hand combatant, Weapons Master and Many other

Personality: Natsu is very kind to those who need him and would not hesitate to help those in need. Despite that, he can become very cruel towards those he think deserve it. But this does not happen much. Since he is very powerful, he does not fear much. But he does get very worried over those he cares about. He can be very eccentric at times and will do things other find weird. He likes to tease people close to him. He tries to stay out of trouble but trouble always manages to find him. If a conflict breaks out, he rarely tries to talk it out and doesn't hesitate to get his hands dirty. He can be very cunning and do things other find disturbing. He will kill those who get a little too on his bad side. Though he is not as cruel as he was before he lost his memories. Joining Fairy Tail had changed his beliefs a little.

Trivia:

Natsu likes to be known as Natsu Dragneel rather than his full name so he never introduces himself as Etherious Natsu Dragneel. Only those whom he sees fit are told his full name.

He likes to annoy people discreetly.

Even though he owns a restaurant, he sucks at cooking anything that is not spicy.

If asked about his age, he replies "How old do I look?" and somehow dodges the question.

He once tried to go to college but dropped out. He avoids the reason if asked.

He wears a ring to discourage women.

If we customers try to flirt with him, pretends not to notice and responds in a manner that will make them visit again. All goes in business.

Rumors have it that he has dealings with an international mafia. (LOL)


A/N: Alright, there you go! The fourth chapter. It was very fun writing this chapter but it took me some time. You now know more about Rose and her past. There is still some stuff about her that you'll see in the future chapters but I think this much was quiet a lot for a revelation. There was also Natsu and Grayfia's little fight. Don't worry if the scale was too small. I have another one planned in the future. And guess what is happening next chapter?

The poll about what to do with Issei and Ddraig is still open for another one or two chapters. If you haven't voted, be sure you do it now. Thank you for all the reviews as I have a lot of fun reading them.

See ya!